How to use screen.on?

[Rysakov1986]

Please help me.
How to use screen.on?
Can you give me some examples?

Thanks!

[Rysakov1986]

I add hook:
screen.on(await imageResource("test.jpg"), (window) => { console.log('test');})
but, what is the next step?

[s1hofmann]

@Rysakov1986 First you register a MatchResultCallback for a certain find resource. This can be an imageResource or a different type of query

const img = await imageResource("test.jpg");
screen.on(img , (result: MatchResult) => {
  console.log('test');
});

Once a hook is registered it will be called whenever the reference you registered it on is found via one of the on-screen search functions like find, findAll or waitFor